[Bug 43224] Freelist scan can result in O(n) time when allocating

https://bugs.winehq.org/show_bug.cgi?id=43224

--- Comment #2 from Henri Verbeet  ---
For what it's worth, if you do end up working on the memory allocator, note
that modern allocators like ptmalloc3/jemalloc/nedmalloc/tcmalloc/etc.
typically have per-thread allocation caches to avoid lock contention, which I
think is another issue Wine's current allocator suffers from.